scholarly journals Experimental study on damage evaluation of stainless steel–reinforced concrete piers under lateral impact

2020 ◽  
Vol 12 (5) ◽  
pp. 168781402092488
Author(s):  
Bo Wu ◽  
Shixiang Xu
Keyword(s):  
Stainless Steel ◽  
Reinforced Concrete ◽  
Impact Damage ◽  
Test System ◽  
Reinforcement Ratio ◽  
Test Results ◽  
Lateral Impact ◽  
Steel Reinforced Concrete ◽  
Steel Bars ◽  
The Impact

Horizontal impact tests of stainless steel–reinforced concrete piers with different reinforcement ratios at different impact velocities were carried out by using the ultra-high drop weight impact test system. Degree of piers damage after impact was comprehensively analyzed by measuring the acceleration of the impact body, the displacement of the top of the pier specimens, the strain of the steel bars, the rotation of the pier bottom, and the crack development of concrete. The test results showed that under the same impact velocity, with the decrease in reinforcement ratio, the peak acceleration of the impact body, the displacement of the top of pier specimens, the strain of steel bars, and the pier bottom rotation all increase. To a certain extent, increasing the reinforcement ratio of bridge piers can effectively reduce impact damage.

scholarly journals Study on Cumulative Damage Law of Stainless Steel-Reinforced Concrete Columns under Step Impact Loading

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Bo Wu ◽  
Shixiang Xu ◽  
Guoxue Zhang
Keyword(s):  
Stainless Steel ◽  
Reinforced Concrete ◽  
Impact Force ◽  
Concrete Columns ◽  
Concrete Specimen ◽  
Test System ◽  
Maximum Displacement ◽  
Reinforced Concrete Columns ◽  
Steel Reinforced Concrete ◽  
The Impact

In this study, an ultrahigh drop hammer impact test system was adopted for multiple horizontal impact tests on stainless steel-reinforced concrete columns and ordinary-reinforced concrete columns with the same longitudinal reinforcement diameter. The damage performance after impact was studied, and the finite element model was established. The test measured the impact force, displacement, cracking of the specimen during the impact, and the concrete damage near the bottom of the specimen. The test results showed that the failure mode of the stainless steel-reinforced concrete specimen under multiple impacts was the same as that of the ordinary reinforced concrete specimen. Under the same impact conditions, the maximum impact force, the maximum displacement, and the damage degree of stainless steel-reinforced concrete column specimen were lower than those of the ordinary reinforced concrete specimen.

Experimental on Impact Mechanical Behavior of the Carbon Fibre Reinforced Plastic-Reinforced Stainless Steel Reinforced Concrete Piers

2020 ◽  
Vol 12 (5) ◽  
pp. 769-777 ◽  
Author(s):  
Guoxue Zhang ◽  
Yingfeng Wang ◽  
Shixiang Xu ◽  
Juan Lu ◽  
Yangyang Zhou
Keyword(s):  
Stainless Steel ◽  
Reinforced Concrete ◽  
Carbon Fibre ◽  
Residual Deformation ◽  
Test System ◽  
Peak Displacement ◽  
Steel Reinforced Concrete ◽  
Reinforced Plastic ◽  
Carbon Fibre Reinforced Plastic ◽  
The Impact

To study the impact resistance of the stainless steel reinforced concrete after reinforced with CFRP (Carbon Fibre Reinforced Plastic), the multifunction ultra-high heavy drop hammer test system was adopted to conduct multiple horizontal impact test research on three stainless steel reinforced concrete piers before and after they are reinforced. The test results showed that with equal impact energy, the maximum impact force of the stainless steel reinforced concrete piers was larger than that of the stainless steel reinforced concrete piers that were reinforced with CFRP, while after the concrete piers were reinforced, the peak displacement of the piers was obviously smaller than that before they were reinforced and the residual deformation also became smaller, which improved the flexural rigidity of the section. And the local anti-damage capacity can be improved so as to lengthen the life of structures by reinforcing the stainless steel reinforced concrete pier with carbon fiber.

scholarly journals Behavior of stainless steel–reinforced concrete piers under lateral impact loading

2017 ◽  
Vol 9 (5) ◽  
pp. 168781401770993 ◽  
Author(s):  
Guoxue Zhang ◽  
Shixiang Xu ◽  
Hongbing Xie ◽  
Xiwu Zhou ◽  
Yingfeng Wang
Keyword(s):  
Stainless Steel ◽  
Reinforced Concrete ◽  
Impact Loading ◽  
Lateral Impact ◽  
Steel Reinforced Concrete

scholarly journals Study on Concrete Pier Impact Performance after Implementing Equal Cross-Section Stainless Steel with Protection from Closed-Cell Aluminum Foam

2020 ◽  
Vol 2020 ◽  
pp. 1-17
Author(s):  
Xiwu Zhou ◽  
Honglong Zhang ◽  
Wenchao Zhang ◽  
Guoxue Zhang
Keyword(s):  
Stainless Steel ◽  
Reinforced Concrete ◽  
Aluminum Foam ◽  
Bridge Piers ◽  
Concrete Bridge ◽  
Reinforced Concrete Bridge ◽  
Impact Forces ◽  
Closed Cell ◽  
Steel Bars ◽  
The Impact

In the present study, in order to examine the impact performances of ordinary reinforced concrete bridge piers which have been replaced by stainless-steel bars of equal cross-sections under the protective condition of anticollision material, the impact dynamic responses of the ordinary reinforced concrete bridge piers, with replacements under the protection of closed-cell aluminum foam, were compared and analyzed using an ultrahigh drop hammer impact test system. The results showed that when the impact velocity was small (for example, less than 1.42 M/s), after the implementation of equal cross-sectional replacements, the closed-cell aluminum foam had been in an elastic or yield stage. During that stage, the impact forces of the stainless-steel reinforced concrete piers were larger than those of the ordinary reinforced concrete piers, and the relative ratios were stable at approximately 28 to 34%. In addition, the relative ratios of the displacements at the tops of the components were also found to be stable at approximately 22%, and the change rates of the concrete ultrasonic damages were approximately the same. However, when the impact forces had increased (for example, more than 1.67 m/s), the closed-cell aluminum foam entered a densification stage, and the peak impact force ratios decreased sharply. It was also observed that the relative peak displacement ratios at the tops of the components displayed increasing trends, and the change rates of the concrete ultrasonic damages had displayed major flux. Therefore, the replacement of the ordinary piers with stainless-steel bars had increased the possibility of shear failures.

scholarly journals Experimental Study on SSRC under Eccentric Compression

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Qingfu Li ◽  
Tianjing Zhang ◽  
Yaqian Yan ◽  
Qunhua Xiang
Keyword(s):  
Stainless Steel ◽  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Building Materials ◽  
Performance Test ◽  
Failure Modes ◽  
Mechanical Performance ◽  
Reinforcement Ratio ◽  
Eccentric Compression ◽  
Steel Bars

The use of stainless steel bars can improve the durability and sustainability of building materials. Through the static performance test, this research analyzes the failure pattern and bearing performance of bias stainless steel reinforced concrete (SSRC) column. The influence of reinforcement ratio of longitudinal bars and eccentricity on the mechanical performance of specimens was studied. Different constitutive models of stainless steel bars were used to calculate the ultimate bearing capacity of the section of the column under eccentric compression column. Based on the experimental results, a method to modify the expression of the design specification is proposed. And, the results were compared with the test results. The results showed that the damage patterns and failure modes of SSRC columns are essentially the same as those of traditional reinforced concrete columns. The bearing capacity of SSRC columns rises with the increase in the longitudinal reinforcement ratio, and the ductility of the specimens is enhanced. The ultimate load of the specimen decreases with the rise in eccentricity but the deflection increases gradually. The strain distribution of the mid-span section of the SSRC column conforms to the plane section assumption. The bearing capacity of the specimen can be analyzed by referring to the calculation method of the specification, and some parameters in the calculation formula of the specification are modified to adapt to the design and calculation of the SSRC column.

scholarly journals An Experimental Study of the Impact Mechanical Properties of RC Beams following Replacements of Stainless Steel Reinforcements of Equal Strength

2019 ◽  
Vol 2019 ◽  
pp. 1-16 ◽  
Author(s):  
Xiwu Zhou ◽  
Runcheng Zhang ◽  
Ruisheng Xiong ◽  
Guoxue Zhang ◽  
Xiangyu Wang
Keyword(s):  
Stainless Steel ◽  
Reinforced Concrete ◽  
Concrete Structure ◽  
Concrete Beams ◽  
Reinforced Concrete Beams ◽  
Reinforced Concrete Structure ◽  
Steel Reinforced Concrete ◽  
Equal Strength ◽  
Steel Bar ◽  
The Impact

The reinforced concrete structure of a port wharf is affected by steel corrosion and ship docking impact. Replacing an ordinary steel bar with a stainless steel bar can solve the corrosion problem of the steel bar while ensuring the bearing capacity of the structure. However, the research on impact resistance of stainless steel-reinforced concrete structure is not perfect. In this paper, impact mechanical properties of reinforced concrete beams before and after equal strength replacement of stainless steel bars are analyzed by theoretical analysis and drop hammer impact test, and the possibility and applicable scope of equal strength replacement of stainless steel bars are put forward. The results indicated the following: (1) when the reinforcement ratios were small (0.21% to 1.32%), the stainless steel-reinforced concrete beams with equal strength were able to effectively reduce the stiffness losses of the beams undergoing impact loads, as well as improve the elastic resilience abilities, and reduce the structural damages. Therefore, the corrosion and impact problems of reinforcements could be solved by replacing ordinary reinforcements with stainless steel reinforcements and (2) when the reinforcement ratios were large (1.32% to 2.57%), the shear failures of the stainless steel-reinforced concrete beams were observed to be relatively serious, and the impact resistance performances had worsened. The research results provide technical support for the engineering application of stainless steel-reinforced concrete structure design.

Dynamic Response Analysis of the T-Shaped Steel Reinforced Concrete Column under Different Impact Conditions

2013 ◽  
Vol 351-352 ◽  
pp. 663-666
Author(s):  
Shou Yan Bai ◽  
Jing Jiang ◽  
Ya Feng Xu
Keyword(s):  
Reinforced Concrete ◽  
Dynamic Response ◽  
Response Analysis ◽  
Concrete Column ◽  
Lateral Impact ◽  
Reinforced Concrete Column ◽  
Impact Site ◽  
Steel Reinforced Concrete ◽  
Finite Element Software ◽  
The Impact

This paper simulated the resistance to lateral impact properties of the T-shaped steel reinforced concrete column through the large finite element software ABAQUS. Extracting the time-displacement curves of different impact sites, by comparison we know: with the impact site is farther and farther from solid end, the maximum lateral displacement in the impact site of the member is bigger and bigger. The maximum displacements in the symmetrical place to the mid-span of the member are very similar. From time-displacement curves of seven models we can know, after reaching the ultimate bearing capacity, the curves leveled off gradually and changed slowly showing good stability and showing good ductility and deformation capacity. It can be concluded: the impact different parts of the dynamic response of lateral impact of the T-shaped steel reinforced concrete columns have a certain impact.

scholarly journals Experimental study of the mechanical properties of steel fiber stainless-steel reinforced concrete (SFSRC) beams under low velocity impact conditions

2021 ◽  
Vol 13 (9) ◽  
pp. 168781402110449
Author(s):  
Xiwu Zhou ◽  
Wen Zhang ◽  
Xiangyu Wang
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Reinforced Concrete ◽  
Shear Failure ◽  
Steel Fiber ◽  
Concrete Beams ◽  
Impact Resistance ◽  
Reinforced Concrete Beams ◽  
Steel Reinforced Concrete ◽  
The Impact

In the present study, based on the previous impact resistance test study results regarding stainless steel reinforced concrete beams, six steel fiber stainless-steel reinforced concrete (SFSRC) beams were subjected to drop-hammer impact tests using an advanced ultra-high heavy multi-function drop hammer impact test system. The goal was to further investigate the mechanical properties of SFSRC beams under impact load conditions. The influencing effects of the steel fiber content and impact velocity levels on the impact resistance mechanical properties of SFSRC beams were analyzed. A digital image correlation method (DIC) was used to analyze the full-field strain and displacement values of the specimens. The results revealed that the steel fibers had significantly enhanced the overall energy dissipation and crack resistance capacities of the specimens, and also improved the brittleness of the stainless steel reinforced concrete beams. In addition, the addition of steel fibers effectively inhibited the local damages of the beam-hammer contact areas. In this study’s experiments, the impact resistance of the beams was observed to be the highest when the fiber content was 2.0%. The internal force formula of the local response stage of the beams showed that the shearing effects had significant impacts on the overall failure modes of the specimens. It was found that with the increases in impact velocity, the failure mode of the SFSRC beams transitioned from bending failure to shear failure, and then to a punching shear failure mode. The DIC results indicated that the addition of steel fiber improved the bonding performances between the concrete matrixes, along with inhibiting the crack development rates through the bond force between the fiber and the concrete.

Sign in / Sign up

Export Citation Format

Share Document